Name an indication for performing a CT angiography (CTA).

CT angiography (CTA) is specifically designed to visualize blood vessels and assess conditions related to vascular health. One of the primary indications for performing a CTA is to evaluate vascular diseases or blockages. This imaging technique enables detailed views of the arteries and veins, allowing healthcare professionals to detect abnormalities such as aneurysms, stenosis, thrombosis, or other vascular pathologies that may impede blood flow.

In contrast, assessing fractures typically requires different imaging modalities, such as traditional X-rays or CT scans focused on bone structures rather than vascular details. Evaluating soft tissue injuries would likely utilize MRI or ultrasound for their superior soft tissue contrast. Monitoring the heart's rhythm is generally managed by electrocardiography (ECG) rather than imaging techniques. Therefore, CTA is best suited for specific vascular assessments, highlighting its utility in diagnosing and managing diseases within the circulatory system.